JP2021145051A - 半導体装置、及びワイヤボンディング方法 - Google Patents
半導体装置、及びワイヤボンディング方法 Download PDFInfo
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- JP2021145051A JP2021145051A JP2020043135A JP2020043135A JP2021145051A JP 2021145051 A JP2021145051 A JP 2021145051A JP 2020043135 A JP2020043135 A JP 2020043135A JP 2020043135 A JP2020043135 A JP 2020043135A JP 2021145051 A JP2021145051 A JP 2021145051A
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- wire
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- 238000000034 method Methods 0.000 title claims description 34
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 6
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Abstract
Description
実施形態に係る半導体装置について説明する。以下では、半導体装置の一例として、半導体素子としてMOSFET(Metal Oxide Semiconductor Field Effect Transistor)を有する半導体装置を示す。しかしながら、半導体装置における半導体素子はMOSFETに限定されるものではない。例えば、IGBT(Insulated Gate Bipolar Transistor)やBJT(Bipolar Junction Transistor)等のその他のトランジスタであってもよい。
まず、実施形態に係る半導体装置の構成について説明する。
図1は、実施形態に係る半導体装置の全体構成を示す平面図であり、図2は、図1のII−II線における半導体装置の断面図である。なお、図示しないが、半導体装置は公知の樹脂等で封止されていてもよい。
次に、第1接合部J1の詳細について、図3及び図4を用いて説明する。
次に、第2接合部J2の詳細について、図5及び図6を用いて説明する。
次に、実施形態に係る半導体装置の製造方法として、ワイヤボンディング方法の一例を説明する。
半導体素子を用いた半導体装置においては、電力変換効率を高めるために、半導体装置のオン抵抗の増加を抑制することが有効である。そのため、半導体素子内部に起因する抵抗の増加を抑制するだけでなく、半導体素子のソース電極と、半導体素子の外部端子とを電気的に接続する導電体に起因する抵抗の増加を抑制することが好ましい。
なお、上述の実施形態は、種々の変形が可能である。
上述の実施形態では、複数のワイヤ20の各々がソース電極60上において、複数の第1接合部J1を有する場合について説明したが、これに限られない。例えば、複数のワイヤ20の各々がソース電極60上において、1つの第1接合部J1を有し、当該第1接合部J1がソース電極60のy方向に沿った第1端から第2端まで延伸していてもよい。
上述の実施形態及び第1変形例では、ソース電極60が半導体基板40の中央領域に設けられた例を示したが、これに限られない。例えば、ゲート電極70が半導体基板40の中央領域に設けられ、ソース電極60が当該ゲート電極70を挟む(又は囲む)ように設けられてもよい。
上述の実施形態、第1変形例、及び第2変形例では、ソース電極におけるすべての接合部のy方向に沿った長さが、端子30との接合部のy方向に沿った長さよりも長い場合を示したが、これらに限られるものではない。例えば、半導体装置において、ソース電極上に、端子30との接合部のy方向に沿った長さよりも長い接合部に加えて、ボールあるいはバンプ、端子30との接合部と同様のy方向に沿った長さを有するステッチ等が形成されたものであってもよい。
Claims (9)
- 第1方向に沿って並ぶ第1パッド及び第2パッドと、
前記第1パッドと接する少なくとも1つの第1部分、及び前記第2パッドと接する第2部分、を有する少なくとも1つのワイヤと、
を備え、
前記第1部分の前記第1方向に沿った長さは、前記第2部分の前記第1方向に沿った長さよりも長い、
半導体装置。 - 前記ワイヤは、
前記第1パッドと接することなく前記第1部分の第1端に接続される第3部分と、
前記第1パッドと接することなく前記第1部分の第2端に接続される第4部分と、
を有する、
請求項1記載の半導体装置。 - 前記第1部分が、前記第1方向に沿って、前記第1パッドの第1端から第2端まで連続的に接する、
請求項1記載の半導体装置。 - 前記少なくとも1つの第1部分は、2つの第1部分を含み、
前記2つの第1部分は、前記第1方向に沿って並ぶ、
請求項1記載の半導体装置。 - 前記半導体装置は、第3パッドをさらに備え、
前記第1パッドは、第1領域及び第2領域を含み、
前記第1パッドの前記第1領域、前記第3パッド、前記第1パッドの前記第2領域、及び前記第2パッドは、前記第1方向に沿ってこの順に並び、
前記ワイヤは、前記2つの第1部分のうちの一方において前記第1領域と接し、前記2つの第1部分のうちの他方において前記第2領域と接する、
請求項4記載の半導体装置。 - 前記少なくとも1つのワイヤは、前記第1方向と直交する第2方向に沿って並ぶ第1ワイヤ及び第2ワイヤを含み、
前記第1ワイヤの前記第1部分、及び前記第2ワイヤの前記第1部分は、前記第2方向に沿って対向する部分と、前記第2方向に沿って対向しない部分と、を有する、
請求項1記載の半導体装置。 - ボンディングツールに設定されたワイヤを第1パッドの第1面上の第1位置に接合することと、
前記ワイヤを繰り出しながら、前記ボンディングツールを前記第1面に平行な第1方向に沿って移動させて、前記ワイヤを前記第1位置から前記第1パッドの前記第1面上の第2位置まで連続的に接合することと、
前記ワイヤを繰り出しながら、前記ボンディングツールを前記第2位置から第2パッド上の第3位置まで移動させて、前記ワイヤを前記第3位置に接合することと、
を備えた、ワイヤボンディング方法。 - 前記第2位置まで連続的に接合した後、前記ボンディングツールを前記第3位置まで移動させる前に、
前記ワイヤを繰り出しながら、前記ボンディングツールを、前記第1パッドの前記第1面上の第4位置まで移動させることと、
前記ワイヤを前記第4位置に接合することと、
前記ワイヤを繰り出しながら、前記ボンディングツールを前記第1方向に沿って移動させて、前記ワイヤを前記第4位置から前記第1パッドの前記第1面上の第5位置まで連続的に接合することと、
を更に備えた、
請求項7記載のワイヤボンディング方法。 - 前記ワイヤから、前記第1位置から前記第2位置まで接合され、かつ前記第3位置に接合された部分を切断することと、
前記ボンディングツールに設定された前記ワイヤを前記第1面上の第6位置に接合することと、
前記ワイヤを繰り出しながら、前記ボンディングツールを前記第1方向に沿って移動させて、前記ワイヤを前記第6位置から前記第1パッドの前記第1面上の第7位置まで連続的に接合することと、
前記ワイヤを繰り出しながら、前記ボンディングツールを前記第7位置から前記第2パッド上の第8位置まで移動させて、前記ワイヤを前記第8位置に接合することと、
を更に備えた、請求項7記載のワイヤボンディング方法。
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